CN102830543A - Display device and image forming apparatus - Google Patents

Display device and image forming apparatus Download PDF

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Publication number
CN102830543A
CN102830543A CN201210201182XA CN201210201182A CN102830543A CN 102830543 A CN102830543 A CN 102830543A CN 201210201182X A CN201210201182X A CN 201210201182XA CN 201210201182 A CN201210201182 A CN 201210201182A CN 102830543 A CN102830543 A CN 102830543A
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China
Prior art keywords
video data
brightness
display panel
data
back light
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Granted
Application number
CN201210201182XA
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Chinese (zh)
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CN102830543B (en
Inventor
岸本健
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Sharp Corp
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Sharp Corp
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Publication of CN102830543A publication Critical patent/CN102830543A/en
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/50—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control
    • G03G15/5016—User-machine interface; Display panels; Control console
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/04—Maintaining the quality of display appearance
    • G09G2320/043—Preventing or counteracting the effects of ageing
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G09G2320/064—Adjustment of display parameters for control of overall brightness by time modulation of the brightness of the illumination source
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0666—Adjustment of display parameters for control of colour parameters, e.g. colour temperature
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving
    • G09G2330/022—Power management, e.g. power saving in absence of operation, e.g. no data being entered during a predetermined time
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/08—Monochrome to colour transformation

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
  • Liquid Crystal (AREA)
  • Controls And Circuits For Display Device (AREA)

Abstract

The invention provides a display device and an image forming apparatus. The display device of an image forming apparatus is provided with a display panel, a backlight unit, a storage portion, and a control portion. The display panel is a transmission type display panel and displays display data. The backlight unit emits light to the back side of the display panel. The storage portion stores a plurality of kinds of display data displayed on the display panel and a plurality of kinds of luminance data set up corresponding to each of the plurality of kinds of display data. The control portion reads out from the storage portion the display data to be displayed on the display panel and the luminance data corresponding to the display data, displays the read display data on the display panel, and performs display control for controlling the luminance of the backlight unit based on the read luminance data.

Description

Display device and image processing system
Technical field
The present invention relates to comprise the display device of back light unit and the image processing system that comprises this display device.
Background technology
The display device that has comprised the display panel of the non-luminous and light-transmission type as liquid crystal panel in order to see the video data that in display panel, shows easily, has backlight in the rear side of display panel.
As display device in the past, just like lower device:, then, transfer to standby mode from normal mode in order to reduce power consumption if there is not operated state continuance certain hour.For example, open in the 2003-162261 communique in the disclosed display device, if transfer to standby mode (Japan) spy; Then reduce brightness backlight; And the video data that will in display panel, show turns to monochrome from color variable, thereby reduces the rewriting number of times of video data, has reduced power consumption.
The backlight of display device used if reduce brightness, then life-saving.But; In display device in the past, if transfer to normal mode from standby mode, then with the video data that in display panel, shows irrespectively; Change to colour from monochrome without exception, brightness backlight is changed to common brightness (high brightness) from low-light level without exception.Therefore, the use of in normal mode, using is long more, and it is also just long more then to light the time backlight with high brightness, and the life-span backlight is short more.In addition, if transfer to normal mode from standby mode, then the power consumption of device increases.
Summary of the invention
The objective of the invention is to, provide a kind of and can prolong the life-span of back light unit and the image processing system that can reduce the display device of power consumption and comprise this display device.
Display device of the present invention comprises display panel, back light unit, storage part, control part.Display panel is light-transmission type and shows video data.Back light unit is to the back side illuminaton light of display panel.A plurality of video datas that storage portion stores shows in display panel and and a plurality of brightness datas that set corresponding with each of a plurality of video datas.Control part is read the video data that should in display panel, show and the brightness data corresponding with this video data from storage part; Show control; Make the video data of reading is presented in the display panel, control the brightness of back light unit based on the brightness data of reading.
Description of drawings
Fig. 1 is the stereo appearance figure of image processing system that comprises the display device of embodiment of the present invention.
Fig. 2 A is the outside drawing of display panel of an example of display device, and Fig. 2 B is the sectional view of display panel, and Fig. 2 C is the front view (FV) of the part of expression back light unit.
Fig. 3 is the front perspective view that presentation video forms the inner structure of device.
Fig. 4 is the block scheme of control system that expression comprises the image processing system of display device.
Fig. 5 is the figure of correlationship of video data and the brightness data of expression storage portion stores.
Fig. 6 is the process flow diagram of the action of explanation image processing system.
Fig. 7 A is a spare picture, and Fig. 7 B is the print job historical picture, and Fig. 7 C is the magnification picture, and Fig. 7 D is the specific function picture.
Fig. 8 A is row's method printed picture, and Fig. 8 B is a color adjustment picture, and Fig. 8 C is a RGB adjustment picture, and Fig. 8 D is the print job picture.
Embodiment
Below, act comprises that the image processing system as the panel unit of an example of display device of the present invention is that example describes.
As shown in Figure 1, image processing system 100 comprises panel unit 110, auto document transmission portion 120, image reading unit 130, image forming part 140 and sheet feed section 150.Panel unit 110 comprises display operation portion 10.
Panel unit 110 is arranged on the face side of the device body upper of image processing system 100.Shown in Fig. 2 A, panel unit 110 comprises display operation portion 10, job status/historical button 22, duplicates selector button 23A, printer selector button 23B, scanner selector button 23C, user set button 24, numerical key 25, start button 26, reset button 27 and SR 28.
Shown in Fig. 2 B and C, display operation portion 10 comprises display panel 11, back light unit 12, housing 13, touch panel 21.Display panel 11 is display panels of light-transmission type, remains in the housing 13.Display panel 11 display color video datas and monochromatic video data.Back light unit 12 is configured in the rear side of display panel 11 in the inboard of housing 13, to the back side illuminaton light of display panel 11.
Back light unit 12 comprises a plurality of LED14, reflector plate 15, diffuser plate 16, diffusion sheet 17 and substrate backlight 19.Back light unit 12 also can replace LED14 and comprise fluorescent tube (CCEF pipe).
In substrate 19 backlight, a plurality of LED14 have been installed with the interval of regulation.Substrate 19 backlight with 16 opposed of diffuser plates on be provided with reflector plate 15.Reflector plate 15 reflexes to the light of LED14 irradiation the direction of display panel 11.
Touch panel 21 is arranged on the face side of display panel 11.Touch panel 21 outputs are used for confirming to have carried out through user's finger the position Detection signal of pressing operation.
Image processing system 100 shows the video data of various selector buttons or representes video data of current operating state etc. in display panel 11.In addition, image processing system 100 is accepted user's operation through panel unit 110.The user passes through operating touch panel 21 or each action button class 22 ~ 28, thereby can make image processing system 100 carry out the presswork or the reading operation of duplicating, printing, scanning etc.
As shown in Figure 3, image reading unit 130 comprises the 1st document board 131 and the 2nd document board 132 in the above.Auto document transmission portion 120 supports the top switch of the 1st document board 131 and the 2nd document board 132 freely; When transmitting the original copy read mode; Through delivery unit 122, via the 2nd document board 132 original copy is sent to original copy discharge tray 123 one by one from original copy accumulating tray 121.
Image reading unit 130 reads through the original copy on the 2nd document board 132 and generates printed image data when transmitting the original copy read mode, when fixing original copy read mode, reads in the original copy of placement on the 1st document board 131 and generates printed image data.
Image forming part 140 forms through the image as the electrofax mode of an example and handles, carrying out monochromatic or colored image with paper and form from the paper supply tray 91 of sheet feed section 150 or 92 paper supplies.As using paper, enumerate the recording medium of common paper, ground paper, ohp film etc.
As shown in Figure 4, in image processing system 100, display operation portion 10, auto document transmission portion 120, image reading unit 130, image forming part 140, sheet feed section 150, storage part 160, image processing part 170 and Department of Communication Force 180 are connected to control part 190.
In image processing system 100, display operation portion 10, storage part 160 and control part 190 constitute display device 101 of the present invention.
If panel unit 110 receives user's operation, then control part 190 carries out the control of display operation portion 10, auto document transmission portion 120, image reading unit 130, image forming part 140 and sheet feed section 150.In addition, if Department of Communication Force 180 receives presswork via communication line 200 from personal computer 210, then control part 190 carries out image formation through image forming part 140.In addition, when the printed image data that need read image reading unit 130 or the printed image data that in the presswork that Department of Communication Force 180 receives, comprises carried out Flame Image Process, control part 190 carried out Flame Image Process through image processing part 170.Image reading unit 130 and Department of Communication Force 180 are equivalent to the portion that accepts of the present invention.
Handling procedure, a plurality of video datas that in the display panel 11 of display operation portion 10, show that storage part 160 storage control parts 190 are carried out, be used to control a plurality of brightness datas etc. of the brightness of back light unit 12.A plurality of brightness datas are set to each the corresponding brightness with a plurality of video datas.
In image processing system 100, the back light unit 12 of display operation portion 10 is carried out reducing the voltage that back light unit 12 is applied under the situation that static state lights, reduce the brightness of back light unit 12.In addition, back light unit 12 is dynamically being lighted under the situation of (pulse is lighted), the dutycycle of change conduction and cut-off reduces the brightness of back light unit 12.
The control part 190 of image processing system 100 shows in the display panel 11 of display operation portion 10 under the situation of video data, the brightness of back light unit 12 is controlled to be 3 kinds of brightness of common brightness (high brightness), middle brightness, low-light level as an example.
In static lighting mode, light with common brightness under the situation of back light unit 12, apply rated voltage.In dynamic lighting mode, accordingly the conduction and cut-off dutycycle is set at 100%, 50% and 20% respectively with the common brightness of back light unit 12, middle brightness and low-light level.
A plurality of video datas that storage part 160 will show in the display panel 11 of display operation portion 10 and be associated with a plurality of brightness datas of each back light unit of setting accordingly 12 of a plurality of video datas and store.For example, the video data that as shown in Figure 5, storage part 160 will manage number, picture title, show in display panel 11 and the brightness data of back light unit 12 are associated and store.
This be at image processing system 100 when standby mode is transferred to normal mode, with back light unit 12 to light with the corresponding brightness of video data that in display panel 11, shows.
Then, based on process flow diagram shown in Figure 6, the action of image processing system 100 is described.
If energized, then the control part 190 of image processing system 100 is read control program and is carried out from storage part 160.In addition, control part 190 reads out in colored subsequent use video data and the corresponding brightness data of video data of the management number 1A that shows when starting from storage part 160.Then, control part 190 shows the video data shown in Fig. 7 A in the display panel 11 of display operation portion 10, is common brightness (S1) with the brilliance control of back light unit 12.If become the state that can carry out presswork, then control part 190 picks up counting, and waits for the acceptance of the operation in display operation portion 10 or the reception (S2) from the presswork of personal computer 210 in Department of Communication Force 180.This state is called normal mode.
(for example passed through the stipulated time after if pick up counting; 5 minutes) the also not acceptance of the operation in display operation portion 10 or the reception (S2: be) in Department of Communication Force 180 from the presswork of personal computer 210, then control part 190 is transferred to the 1st standby mode from normal mode.At this moment, control part 190 is reduced in the temperature that needs the part of heating in the image forming part 140, reduces power consumption.
In addition; Control part 190 is in the 1st standby mode; From storage part 160, read video data and the brightness data of management number 1B, and, restart timing (S3) brightness brightness from common brightness (high brightness) changes to of the back light unit 12 of display operation portion 10.Subsequent use video data (colour) when in addition, the subsequent use video data (colour) during normal mode is with the 1st standby mode is identical data.
, the brightness with back light unit 12 (for example passed through the stipulated time after the brightness in changing to; 5 minutes) do not detect yet the user operation acceptance or from the reception (S4: be) of the presswork of personal computer 210, then control part 190 is transferred to the 2nd standby mode from the 1st standby mode.At this moment, control part 190 is read video data and the brightness data of management number 1C from storage part 160.The subsequent use video data of the colour that will in display panel 11, show then, changes to monochromatic subsequent use video data.In addition, the brightness with back light unit 12 changes to low-light level (S5).In addition, the subsequent use video data of the colour of the 1st standby mode is identical with the content of the subsequent use video data of the monochrome of the 2nd standby mode, and color is different.
Thus, through brightness at each change back light unit 12 stipulated time, thereby the brightness of back light unit can not change sharp, can not bring sense of discomfort so can reduce the power consumption of display device to the user of the demonstration of seeing display device.In addition, can prolong the life-span of back light unit 12.
In addition, the user can change the stipulated time of step S2 and step S4.
If do not detect the user operation acceptance or from the reception (S6: not) of the presswork of personal computer 210; Then control part 190 then shows monochromatic subsequent use video data in display panel 11, and is low-light level (S5) with the brilliance control of back light unit 12.
On the other hand, if detect the user operation acceptance or from the reception (S6: be) of the presswork of personal computer 210, then control part 190 is transferred to normal mode from the 2nd standby mode.Control part 190 is read from storage part 160 and operation that receives or corresponding video data and the brightness data (S7) of detected operation.Then, control part 190 shows control, makes the video data that demonstration is read in display panel 11, and is the brightness (S7) corresponding with this video data with the brilliance control of back light unit.
Control part 190 is that monochromatic video data and brightness data are set at (S8: be) under the low-light level data conditions at the video data of reading, and in display panel 11, shows monochromatic video data, and is low-light level (S5) with the brilliance control of back light unit 12.
For example, under the situation of the job status that detects panel unit 110/historical button 22 and the operation of duplicating selector button 23A, control part 190 is read video data and the brightness data of management number 2-1 from storage part 160.Then, in the print job history display data that show the monochrome shown in Fig. 7 B in the display panel 11, and back light unit 12 is set at low-light level.
In addition, under the situation of the operation of the magnification button 305 that detects the spare picture 300 shown in Fig. 7 A through touch panel 21, control part 190 is read video data and the brightness data of management number 1-6 from storage part 160.Then, at the magnification video data that shows the monochrome shown in Fig. 7 C in the display panel 11, and back light unit 12 is set at low-light level.
Shown in the print job history display data or the magnification video data shown in Fig. 7 C shown in Fig. 7 B; If the video data that in display panel 11, shows is to comprise the video data of character and table or only is the video data of character; Even then back light unit 12 is controlled to be low-light level; Also pass through in display panel 11, to show video data, thereby the user can fully confirm the content of video data with monochrome.Therefore, in image processing system 100 (display device 101), when the 2nd standby mode is transferred to normal mode, the video data of aforesaid characteristic is presented in the display panel 11 with monochrome, and back light unit 12 is set at low-light level.In addition; Based on same reason; After the print job situation video data shown in specific function video data, the adjustment video data of the color shown in Fig. 8 B and Fig. 8 D shown in Fig. 7 D of stating also be presented in the display panel 11 with monochrome, and back light unit 12 is set at low-light level.
Control part 190 (S8: not, S9: be) under the video data of reading is the situation of brightness during colored video data and brightness data are set at, display color video data in display panel 11, and be middle brightness with the brilliance control of back light unit 12.
For example, under the situation of the operation of the specific function button 301 that detects the spare picture 300 shown in Fig. 7 A through touch panel 21, control part 190 is read video data and the brightness data of management number 1-1 from storage part 160.Then, at the specific function video data that shows the monochrome shown in Fig. 7 D in the display panel 11, and back light unit 12 is set at low-light level.Then, under the situation of the operation of row's method (2in1/4in1) button 343 that detects the specific function picture 340 shown in Fig. 7 D through touch panel 21, control part 190 is read video data and the brightness data of management number 1-1-3 from storage part 160.Then, at the row's method video data that shows the colour shown in Fig. 8 A in the display panel 11, and back light unit 12 is set at middle brightness.
Shown in row's method video data shown in Fig. 8 A; If the video data that in display panel 11, shows is the video data that comprises needs such as the video data differentiation color of character and figure; Be low-light level then, then be difficult to see video data as if brilliance control with back light unit.Therefore, in image processing system 100 (display device 101), when the 2nd standby mode is transferred to normal mode, the video data of aforesaid characteristic is presented in the display panel 11 with colour, and back light unit 12 is set at middle brightness.
Control part 190 is that colored video data and brightness data are set at (S8: not under the situation of common brightness at the video data of reading; S9: not); Display color video data in display panel 11, and be common brightness (S1) with the brilliance control of back light unit 12.
For example, as if the operation of the color adjustment button 345 that detects the specific function picture 340 shown in Fig. 7 D through touch panel 21, then control part 190 is read video data and the brightness data of management number 1-1-5 from storage part 160.Then, showing the color adjustment video data of the monochrome shown in Fig. 8 B in the display panel 11, and back light unit 12 is being set at low-light level.Then, as if the operation of RGB (red/green/indigo plant) the adjustment button 361 that detects the color adjustment picture 360 shown in Fig. 8 B through touch panel 21, then control part 190 is read video data and the brightness data of management number 1-1-5-1 from storage part 160.Then, showing the RGB adjustment video data of the colour shown in Fig. 8 C in the display panel 11, and back light unit 12 is being set at common brightness.
Shown in the RGB adjustment video data shown in Fig. 8 C; The video data that in display panel 11, shows is under the situation of video data that should show with colour or the video data that comprise very thin character or figure etc.; If the brightness of back light unit is made as also lower, then be difficult to see video data than common brightness (high brightness).Therefore; In image processing system 100 (display device 101); When the 2nd standby mode is transferred to normal mode, the video data of aforesaid characteristic is presented in the display panel 11 with colour, and back light unit 12 is set at common brightness (high brightness).
Control part 190 also can change under the situation of high brightness from low-light level in the brightness with back light unit, is set at and changes brightness interimly.Image processing system is when the 2nd standby mode, and is such as stated, and image forming part is made as holding state, for example needs about 60 seconds till returning to the state that can print.At this moment, control part 190 is if detect user's operation in step S6, then from storage part 160, reads expression and transferring to the video data of normal mode and be presented in the display panel 11, and be low-light level with the brilliance control of back light unit 12.If through 30 seconds, then control part 190 changes to middle brightness (S 12) with the brightness of back light unit 12.Then, if further through 30 seconds, promptly in step S6, detect after user's the operation after 60 seconds, control part 190 changes to high brightness (S 1) with the brightness of back light unit 12.Perhaps, also can the brightness of back light unit 12 be changed to high brightness (S13) lentamente from low-light level.Thus, because the brightness of back light unit 12 changes interimly, can not bring sense of discomfort to the user so brightness can be changed.
In step S2 or step S4; (for example passing through the stipulated time; 5 minutes) before; Receive under user's the operation or situation that (S2: not or S4: not), whether the operation that control part 190 is confirmed to carry out is that ormal weight is above, for example to print number be the presswork (S10) more than 10 from the presswork of personal computer 210.Control part 190 is to print under the situation of the presswork of number more than 10 (S10: be) in the operation that will carry out, from storage part 160, reads video data and the brightness data of management number 3-1.Then, at the print job situation video data that shows the monochrome shown in Fig. 8 D in the display panel 11, and back light unit 12 is set at low-light level (S11).
Till presswork finishes, control part 190 do not change show state and the affirmation of carrying out situation that in display operation portion 10, shows presswork with video data (S12: deny, S11).If presswork finishes (S12: be), then control part 190 carries out the processing of step S7.
In addition, (S10: not), control part 190 carries out the processing of step S7 under processing that in step S2 or step S4, receives and the presswork condition of different of printing number more than 10.
At this moment, control part 190 is read video data corresponding with the operation that will carry out and the brightness data corresponding with this video data from storage part 160.Then, control part 190 shows the video data of reading in display panel 11, and controls the brightness of back light unit 12 based on the brightness data of reading.
Thus; In image processing system 100; Except at the effluxion of not carrying out operation during the stipulated time, when the input of operation that the user is arranged or operation, also according to the content of the video data that when the operation that execution receives, shows; Reduce brightness, and change the color of video data in order to improve visuognosis property.Thus, can prolong display operation portion 10 back light unit 12 life-span and can reduce power consumption and can not reduce the visuognosis property of video data.
In addition; In above-mentioned explanation, the situation of after just starting, lighting the back light unit 12 of display operation portion 10 with common brightness is illustrated, but is not limited thereto; Also can be after just starting, the color or the brightness of changing video data according to the content of video data.For example, even the brilliance control of back light unit 12 is low-light level and shows that as monochromatic video data the visuognosis property of the video data of the menu screen of demonstration can not reduce after just starting yet.Therefore, also can be after just starting, be low-light level with the brilliance control of back light unit 12, show monochromatic video data.
Whether in addition, also can be that the user can be set in after the firm startup such as stated with low-light level/monochromatic video data display menu picture.
In addition, explained that the brightness settings with back light unit 12 is the example of 3 kinds of brightness of common brightness (high brightness), middle brightness, low-light level, but be not limited thereto, also can be and further change brightness according to video data carefully.
In addition, in above-mentioned explanation, enumerating the situation that display device of the present invention is arranged in the image processing system is that example is illustrated, but the present invention is not limited thereto.For example, the present invention also can be applied to mobile phone or personal computer etc. and comprises in the equipment of display part (display device).
Should think the explanation illustration just in all respects of above-mentioned embodiment, be not to be restrictive.Scope of the present invention is to be represented and be not above-mentioned embodiment by the scope of claims.In addition, in scope of the present invention, intention comprises implication that the scope with claims is equal to and the whole changes in the scope.

Claims (8)

1. display device comprises:
Display panel shows video data and is light-transmission type;
Back light unit is from the back side illuminaton light of said display panel;
Storage part is stored in a plurality of video datas that show in the said display panel and and a plurality of brightness datas that set corresponding with each of said a plurality of video datas; And
Control part; From said storage part, read the video data that should in said display panel, show and the brightness data corresponding with this video data; Show control; Make the video data of reading is presented in the said display panel, control the brightness of said back light unit based on the brightness data of reading.
2. display device as claimed in claim 1 comprises:
Operating portion is accepted user's operation,
Said control part is at the standby mode that from the brilliance control with said back light unit is the brightness also lower than common brightness, and said operating portion is accepted operation and when transferring to the normal mode that carries out corresponding to the processing of this operation, carried out said demonstration control.
3. display device as claimed in claim 1, wherein,
Said control part changes the brightness of said back light unit based on the brightness data of from said storage part, reading interimly in each stipulated time.
4. display device as claimed in claim 1, wherein,
The video data that in said display panel, shows do not comprise under the situation of figure, and said storage part is associated to the low-light level data that this video data are presented at the monochromatic video data in the said display panel with monochrome and are set at the brightness also lower than the common brightness of said back light unit and stores.
5. display device as claimed in claim 2, wherein,
The video data that in said display panel, shows do not comprise under the situation of figure, and said storage part is associated to the low-light level data that this video data are presented at the monochromatic video data in the said display panel with monochrome and are set at the brightness also lower than the common brightness of said back light unit and stores.
6. display device as claimed in claim 3, wherein,
The video data that in said display panel, shows do not comprise under the situation of figure, and said storage part is associated to the low-light level data that this video data are presented at the monochromatic video data in the said display panel with monochrome and are set at the brightness also lower than the common brightness of said back light unit and stores.
7. image processing system comprises:
Accept portion, accept presswork;
Image forming part is printed on the printed image data corresponding with the presswork that the said portion of acceptance receives on the recording medium; And
The described display device of each of claim 1 to 6 is with being presented in the said display panel with the relevant video data of presswork that the said portion of acceptance receives.
8. image processing system as claimed in claim 7, wherein,
If the said portion of acceptance receives the above presswork of ormal weight; Then said control part is read presswork from said storage part the affirmation of carrying out situation with video data and with this affirmation with the corresponding brightness data of video data, thereby carry out said demonstration control.
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